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VII/257    2MASS-selected Isolated Galaxies (2MIG)    (Karachentseva+, 2010)

The Catalog of Isolated Galaxies selected from 2MASS. Karachentseva V.E., Mitronova S.N., Melnyk O.V., Karachentsev I.D. <Astrophys. Bull., 65, 1-25 (2010)> =2010AstBu..65....1K
ADC_Keywords: Galaxy catalogs ; Galaxies, IR ; Morphology ; Photometry, infrared; Space velocities Keywords: catalogs: galaxies - galaxies: fundamental parameters - infrared: galaxies - velocities: space velocities Abstract: We undertook searches for isolated galaxies based on automatic selection of infrared sources from the Two Micron All-Sky Survey (2MASS, Cat. II/246) followed by a visual inspection of their surrounding. Using a modified criterion by Karachentseva (1973SoSAO...8....3K), we compiled a catalog of 3227 isolated galaxies (2MIG) containing 6% of 2MASS Extended Sources (2MASX, Cat. VII/233) brighter than Ks=12mag with angular diameters aK≤30". The most isolated 2493 galaxies among them enter in the 2MASS Very Isolated Galaxy Catalog, 2MVIG. Being situated in the regions of extremely low mass density, the 2MVIG galaxies can serve as a reference sample for investigation the influence of environment on structure and evolution of galaxies. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file 2mig.dat 106 3227 2MASS-selected Isolated Galaxies Catalog (2MIG)
See also: VII/82 : Catalogue of Isolated Galaxies (Karachentseva+ 1986) II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003) VII/233 : The 2MASS Extended sources (IPAC/UMass, 2003-2006) J/other/BSAO/57.5 : 2MASS-selected Flat Galaxy Catalog, 2MGGC (Mitronova+ 2004) Byte-by-byte Description of file: 2mig.dat
Bytes Format Units Label Explanations
1- 4 I4 --- 2MIG Galaxy number 6- 7 I2 h RAh Right Ascension (J2000.0) 8- 9 I2 min RAm Right Ascension (J2000.0) 10- 14 F5.2 s RAs Right Ascension (J2000.0) 15 A1 --- DE- Declination sign (J2000.0) 16- 17 I2 deg DEd Declination (J2000.0) 18- 19 I2 arcmin DEm Declination (J2000.0) 20- 23 F4.1 arcsec DEs Declination (J2000.0) 25- 40 A16 --- Name Galaxy name in the known catalogs 41- 45 F5.1 arcsec r K-band fiducial elliptical Kron radius 48- 52 F5.2 mag Ksmag Ks-band fiducial elliptical Kron magnitude 55- 57 I3 --- 2s Dimensionless "separation" between isolated galaxy and its nearest significant neighbour 60- 64 I5 km/s HRV ? Heliocentric radial velocity taken from LEDA or NED databases 67- 68 I2 --- T Morphological type in de Vaucouleurs' scale (T=-2 is any elliptical galaxies) 70 I1 --- N ? Number of significant neighbours of the isolated galaxy detected during our additional inspection on DSS (1) 73-106 A34 --- Comm ? Comments (2)
Note (1): A blank means that the galaxy belongs to 2MVIG (2MASS Very Isolated Galaxy) Note (2): Comments about galaxy morphological peculiarity and its identification in NED with CIG (Cat. VII/82), IRAS (Cat. II/125), as well as the catalogs and lists of active and peculiar galaxies; Vc indicates a companion with nearby (≤500km/s) velocities
Acknowledgements: Valentina Karachentseva, valkarach(at)gmail.com Sofia Mitronova, mit(at)sao.ru Olga Melnyk, melnykov(at)svitonline.com Igor Karachentsev, ikar(at)sao.ru History: * 18-Dec-2009: original vesion (from Valentina Karachentseva) * 25-Mar-2011: cross-identification of 2MIG 2008 with KIG644 removed (from H.Andernach, confirmed by the author)
(End) S. Mitronova [SAO RAS Nizhnii Arkhyz Russia], P. Vannier [CDS] 18-Dec-2009
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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